How many words can I check for free on Duplichecker?

The free version of Duplichecker allows users to check up to 1,000 words per single search without requiring a paid subscription.

Is my data stored on Duplichecker's servers?

No. Duplichecker prioritizes user privacy. Once the plagiarism check is complete, the uploaded text or documents are automatically discarded from their system to prevent data leakage.

Does Duplichecker offer an API for developers?

Yes, Duplichecker provides a plagiarism checker API that supports various programming languages like PHP, Python, and Java for integration into third-party platforms.

Can I check for plagiarism in languages other than English?

Yes, the tool is multilingual and supports over 25 languages, including Spanish, French, German, Italian, and many others.

What file types does Duplichecker support?

Duplichecker supports a wide variety of file formats, including .tex, .txt, .doc, .docx, .odt, .pdf, and .rtf.

Does it include AI content detection?

Yes, Duplichecker features an AI detector that can identify if content has been generated by artificial intelligence models.

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Plagiarism detection

Freemium

Duplichecker

A comprehensive AI-powered plagiarism checker and writing suite that detects duplicate content, checks grammar, and provides AI detection and paraphrasing tools for global users.

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Rating

Reviews

Upvotes

5 months ago

Listed

Plagiarism detection

Grammar checker

AI content detector

SEO tools

Paraphrasing tool

Reverse image search

Writing assistant

Content integrity

Academic tools

Text analysis

Tool information

Provider

Duplichecker

Platforms

Web

Windows

MacOS

Linux

Android

iOS

Languages

English

Spanish

Portuguese

Russian

German

Italian

Indonesian

Arabic

Turkish

Dutch

Vietnamese

French

Swedish

Korean

Japanese

Danish

Romanian

Norwegian

API Available

Yes

Added to directory

5 months ago

Last updated

3 months ago

Rating

Not available

Pricing

Freemium

About Duplichecker

What the tool does and who it's for

Duplichecker is a versatile AI-powered platform primarily known for its plagiarism detection capabilities. It utilizes advanced algorithms and deep search technology to scan documents, URLs, and text against a massive database of web pages, academic journals, and books. Beyond originality checks, the tool provides a comprehensive suite of writing aids, including an AI content detector, grammar and spell checker, paraphrasing tool, and reverse image search. It is designed to serve a wide range of users, from students and researchers ensuring academic integrity to SEO professionals and businesses protecting their digital content.

Key capabilities

Deep search technology for thorough plagiarism scanning across billions of web pages and academic sources.

Support for multiple file formats including PDF, DOCX, TXT, RTF, ODT, and TEX.

Integrated AI content detector to identify text generated by models like GPT-4 or Claude.

Advanced paraphrasing tool that helps rewrite content while maintaining the original meaning.

Reverse image search to track unauthorized usage of visual content across the web.

Multi-language support for plagiarism and grammar checks in over 25 languages.

Detailed plagiarism reports with percentage scores and side-by-side comparisons of matched text.

URL-based scanning to check existing web pages for content duplication.

Privacy-focused processing with full data encryption and immediate deletion of text after scanning.

Grammar and spell checker that provides real-time suggestions to improve writing quality.

Pricing

Freemium — plans below

Free

1,000 words per search limit
Basic plagiarism detection
Grammar checking
No signup required for basic use

Basic (Weekly)

$5.00/week

Up to 30,000 words total
72 searches per week
PDF report downloads
Ad-free experience
Deep search technology

Pro (Monthly)

Enterprise (Annual)

$110.00/year

1,200 searches per year
Full API integration
Highest word limits per scan
Dedicated customer support
White-label reporting options

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